Mass spectrometry and X‑ray diffraction are common biochemical techniques for characterizing proteins. Classify each statement based on whether it applies to mass spectrometry, X‑ray diffraction, or both techniques.
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Mass spectrometry and X‑ray diffraction are common biochemical techniques for characterizing proteins.
Classify each statement based on whether it applies to mass spectrometry, X‑ray diffraction, or both techniques.
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- What procedures are utilized in optical analysis to determine a solution's concentration based on colorimeter absorbance measurements?Which of the following statements is correct about polarography?I. It is the earliest voltammetric technique introduced.II. It is carried out in an unstirred solution.III. It uses a dropping mercury electrode.IV. It uses a triangular waveform.Which of the following is true? A dilute solution with ingredient that absorbs at the wavelength of analysis will not obey Beer Lambert’s law. In uv-vis spectroscopy, the higher the absorbance the higher the % transmittance. In uv-vis spectroscopy, shining light to any substance would result in absorbance of the light by the substance regardless of energy of the incident light. Only samples with inherent uv-vis absorbing material can be analyzed by a uv-vis spectrometer.
- Why must solutions with high concentrations be diluted prior to analysis via Beer's Law? A. The relationship between absorbance and concentration is not linear at high concentrations. B. The detector will reach its detection threshold. C. The photon source is too weak to provide accurate results. D. There is no need to work with dilute concentrations; any concentrations will work. E. The molar absorptivity of a compound is dependent on its concentration.The concentration of methylene blue in the sample is estimated through (select the correct) options: refractive index measurement (refractometry). turbidity measurement (turbidimetry). absorbance measurement (spectrophotometry). titration with 2% HCl solution.10. In what ways can a refractive index be used to characterize a liquid sample? 11. Describe how to adjust the light for measurement in the Abbe Refractometer
- How does pipetting laboratory techniques affect absorbance values when using UV-Vis Spectrophotometry?Investigate and explain two experimental methods to measure the molecular ` weight distribution of polymers.Please complete Table 2 and show the calculations for protein concentration and the concentration of the undiluted sample. a). Using Excel software, enter data from Table 1 to plot a standard curve (corrected average absorbance on Y-axis and protein concentrations on X-axis). The standard curve must contain correct labels on both axes. b). From the standard curve, obtain a best fit line and equation. c). Use the best fit equation and data from Table 2 to find the concentrations of proteins in sample A2-D2 and E1. [onto your plotted standard curve, indicate where A595 of A2-D2 and E1 are located] d). Calculate the concentrations of proteins in undiluted samples A to E. Thank you very much.
- Is there a possibility that polarography can differentiate between Cr (III) or Cr (VI)?Chemistry a. Are there methods other than spectrophotometry to determine protein concentration? If there is, please provide an explanation of this method along with its advantages and disadvantages! b. Explain the principle of protein separation by electrophoresis method! c. Can protein electrophoresis method be used to characterize proteins? Please explain why!Briefly explain why it is NOT accurate to calculate the concentration of a sample whose absorbance is 0.185 using the equation y=0.0022x+0.0005 r^2=0.999